///////////////////////////////////////////////////////////////////////
private CWintabContext OpenTestSystemContext(
int width_I = m_TABEXTX, int height_I = m_TABEXTY, bool ctrlSysCursor = true)
{
bool status = false;
CWintabContext logContext = null;
try
{
// Get the default system context.
// Default is to receive data events.
//logContext = CWintabInfo.GetDefaultDigitizingContext(ECTXOptionValues.CXO_MESSAGES);
logContext = CWintabInfo.GetDefaultSystemContext(ECTXOptionValues.CXO_MESSAGES);
// Set system cursor if caller wants it.
if (ctrlSysCursor)
{
logContext.Options |= (uint)ECTXOptionValues.CXO_SYSTEM;
}
if (logContext == null)
{
TraceMsg("FAILED to get default digitizing context.\n");
return(null);
}
// Modify the digitizing region.
logContext.Name = "WintabDN Event Data Context";
WintabAxis tabletX = CWintabInfo.GetTabletAxis(EAxisDimension.AXIS_X);
WintabAxis tabletY = CWintabInfo.GetTabletAxis(EAxisDimension.AXIS_Y);
logContext.InOrgX = 0;
logContext.InOrgY = 0;
logContext.InExtX = tabletX.axMax;
logContext.InExtY = tabletY.axMax;
logContext.OutOrgX = (int)SystemParameters.VirtualScreenLeft;
logContext.OutOrgY = (int)SystemParameters.VirtualScreenTop;
logContext.OutExtX = (int)SystemParameters.VirtualScreenWidth;
// In Wintab, the tablet origin is lower left. Move origin to upper left
// so that it coincides with screen origin.
logContext.OutExtY = -(int)SystemParameters.VirtualScreenHeight;
// Open the context, which will also tell Wintab to send data packets.
status = logContext.Open();
TraceMsg("Context Open: " + (status ? "PASSED [ctx=" + logContext.HCtx + "]" : "FAILED") + "\n");
}
catch (Exception ex)
{
TraceMsg("OpenTestDigitizerContext ERROR: " + ex.ToString());
}
return(logContext);
}
///////////////////////////////////////////////////////////////////////
/// <summary>
/// Opens a Wintab default system context
/// </summary>
/// <param name="ctrlSysCursor"></param>
/// <returns></returns>
private CWintabContext OpenTestSystemContext(bool ctrlSysCursor = true)
{
bool status = false;
CWintabContext logContext = null;
try
{
// Get the default system context.
// Default is to receive data events.
logContext = CWintabInfo.GetDefaultSystemContext(ECTXOptionValues.CXO_MESSAGES);
// Set system cursor if caller wants it.
if (ctrlSysCursor)
{
logContext.Options |= (uint)ECTXOptionValues.CXO_SYSTEM;
}
else
{
logContext.Options &= ~(uint)ECTXOptionValues.CXO_SYSTEM;
}
if (logContext == null)
{
TraceMsg("FAILED to get default wintab context.\n");
return(null);
}
// ----------------------------------------------------------------------
// Modify the tablet extents to set what part of the tablet is used.
Rectangle newTabletInRect = new Rectangle();
Rectangle newTabletOutRect = new Rectangle();
SetTabletExtents(ref logContext, newTabletInRect, newTabletOutRect);
// ----------------------------------------------------------------------
// Modify the system extents to control where cursor is allowed to move on desktop.
Rectangle newScreenRect = new Rectangle();
SetSystemExtents(ref logContext, newScreenRect);
// Open the context, which will also tell Wintab to send data packets.
status = logContext.Open();
TraceMsg("Context Open: " + (status ? "PASSED [ctx=" + logContext.HCtx + "]" : "FAILED") + "\n");
}
catch (Exception ex)
{
TraceMsg("OpenTestDigitizerContext ERROR: " + ex.ToString());
}
return(logContext);
}
/// <summary>
/// Tries initializing the tablet reading logic. Returns false on failure.
/// </summary>
public bool Start()
{
try
{
winTabContext = CWintabInfo.GetDefaultSystemContext(ECTXOptionValues.CXO_MESSAGES | ECTXOptionValues.CXO_SYSTEM);
winTabData = new CWintabData(winTabContext);
// Failed to get the system context
if (winTabContext == null)
{
return(false);
}
winTabContext.Name = "DynamicDraw Tablet Event Data Context";
WintabAxis tabletX = CWintabInfo.GetTabletAxis(EAxisDimension.AXIS_X);
WintabAxis tabletY = CWintabInfo.GetTabletAxis(EAxisDimension.AXIS_Y);
winTabContext.InOrgX = 0;
winTabContext.InOrgY = 0;
winTabContext.InExtX = tabletX.axMax;
winTabContext.InExtY = tabletY.axMax;
// Tablet origin is usually lower left, invert it to be upper left to match screen coord system.
winTabContext.OutExtY = -winTabContext.OutExtY;
bool didOpen = winTabContext.Open();
winTabData.SetWTPacketEventHandler(UpdateTabletData);
return(true);
}
catch (DllNotFoundException)
{
// winTab32.dll is missing. Tablet users will have it; non-tablet users don't need it.
return(false);
}
}